Boiler-furnace.



W. LEMB. BOILER FURNACE. APPLIGATION FILED FEB. 9/1912.

Patented Oct. 29, 1912.

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' BOILEfi-FURNACE.

Ratented Get. $39, 1912.

Application filed February 9, 1912. serial No. 676,620. I

To all whom it mag concern: I Y

Be it known that 1, WILLIAM LEMB, a citizen of the United States, and a resident of New York, in the county of Kings and State of New York, have invented certain new and useful Improvements in Boiler-Furnaces, of which the following is aspecification.

This invention relates to boiler furnaces and particularly to therear arch of the combustion. chamber thereof.

The object of my improvements is to provide a rear arch, simple in construction, of long life and the parts of which are easily removable for repair or replacement.

To these ends my improvements comprise parts and combinations of parts illustrated pendently of the between side disposed at a in their preferred embodiment in the drawings accompanying this specification wherein- Figure 1 is a rear sectional elevation, on line 1, 1 of Fig. 2, of so much of a boiler furnace as will suiiice to adequately illustrate my improvements. Fig. 2 is a longitudinal sectional elevation on line 2, 2 of Fig. 1. Figs. 3 and 4c are perspective views of details of my improvements. 4

In constructions of the character specified it is desirable to support the rear arch indeboiler so that the expansion and contraction of the boiler will not disturb the rear arch setting, all well known in the art. I have also found it highly desirable to support said arch independently of the back wall and one feature of my improvements is directed to such independent support. Another feature of my improvements is directed to providing a construction that will permit the free removal of one or more of the fire-brick portions Without disturbing the remaining portions.

A further feature of my improvements comprises means for ventilating the arch supports to keep those support-s cool and thus prevent their sagging through being overheated.

These and other features will be more fully described herein and pointed out in the claims.

The nsual cylindrical boiler 3 provided with theusual combustion fiues 7 is mounted walls as 4, and rear wall 5 is suitable distance rearwardly of said boiler t9 provide room for rear combustion chamber 6. Said combustion chamher is lined on its sides with the usual firebrick as s and on its rear with fire-brick 9.

Just above said combustion chamber 6 and adjacent to the rear end of boiler 3 is front cross support 10 and at a lower level and adjacent to lining 9 of rear wall 5 is rear cross support 11. Said supports are preferably horizontal and parallel and their ends are bedded in and supported by side walls as 4. Said sup orts are preferably cylindrical and tubu er and through said sidewalls as atlOO and 110. By this arrangement some suitable fluid as air or water may be circulated therethrough for ventilating or cooling purposes.

The arch of my improved combustion chamber comprises a palr or a plurality of pairs of fire resisting members or, firebricks as 12, 13. car brick 13 may have an approximately square end profile and is provided with a groove 14 lengthwise therethrough by whichit preferably project is adapted to span and be supported by support 11. .Saidr groove v ispreferably of .sufficient depth to permit the rear face 15 of brick 13 to rear lining 9 and said groove is preferably provided in its upper face with an undercut portion 16 to permit said brick to interlock with support 11. Up er brick 12 is of elongated form and the orward end thereof is provided with a cross groove 17 for engagement with support 10. Said groove is of sufficient depth to permit said brick to surround on three sides support 10 and said groove is preferably undercut at 19 for interlocking with said support. The rear end 20 of said upper brick rests upon and is supported by rear brick 13. Upper brick 12 is preferably provided with inwardly beveled sides 21, 22 so that contiguous bricks provide a channel therebetween for the reception of insulating material such-as fire clay as shown at 23. I also preferably in wardly bevel front end 18-and rear end 20 to provide channels between the boiler rear end and rear wall and said brick ends respectively for fire clay.

claim 2* 1. A combustion chamber arch including in combination, a pair of opposite side walls, a pair of cross supports supported from said side walls, a rear fire brick having a groove therein adapted to span said rear cross sup port and be supported thereby, said groove havingan undercut portion to interlock with said support, and an upper fire brick abut against supported at its forward end by said front cross support and at its rearward end by said rear fire brick.

2. A combustion chamber arch including in combination, a pair of opposite side walls, a pair of ventilated cross supports supported from said side Walls, a rear firebrick having a groove therein adapted to span said rear cross support and be supported thereby, said groove having an undercut portion to interlock with said sup: port and an upper fire-brick adapted at its forward end to span said front cross support and to be supported thereby and at its rearward end to rest upon said rear tirebrick.

3. A combustion chamber arch including in combination, a pair of opposite side walls, a front cross member and a rear cross inenr .1 her supported from said side walls, a rear fire brick having a groove therein adapted to span said rear cross member and be sup ported thereby, said groove havingan undercut portion to interlock With said rear cross member, and an upper fire brick sup ported at ts forward end and surrounding said front cross member and restin at its rear end on said rear fire brick, sai upper tire brick being removable independently of? and Without displacing said rear fire brick. Signed at New York, in the county of New York and State of New York, this 7th day of February, 1912, before two subscribing Witnesses. 1

VJILLIAM LEMB. Witnesses Louis B. 'lrsorrnnn, CHAs. W. LA Run. 

